(function (global, factory) {
  typeof exports === "object" && typeof module !== "undefined"
    ? factory(exports)
    : typeof define === "function" && define.amd
    ? define(["exports"], factory)
    : ((global =
        typeof globalThis !== "undefined" ? globalThis : global || self),
      factory((global.TWEEN = {})));
})(this, function (exports) {
  "use strict";

  /**
   * The Ease class provides a collection of easing functions for use with tween.js.
   */
  var Easing = {
    Linear: {
      None: function (amount) {
        return amount;
      },
    },
    Quadratic: {
      In: function (amount) {
        return amount * amount;
      },
      Out: function (amount) {
        return amount * (2 - amount);
      },
      InOut: function (amount) {
        if ((amount *= 2) < 1) {
          return 0.5 * amount * amount;
        }
        return -0.5 * (--amount * (amount - 2) - 1);
      },
    },
    Cubic: {
      In: function (amount) {
        return amount * amount * amount;
      },
      Out: function (amount) {
        return --amount * amount * amount + 1;
      },
      InOut: function (amount) {
        if ((amount *= 2) < 1) {
          return 0.5 * amount * amount * amount;
        }
        return 0.5 * ((amount -= 2) * amount * amount + 2);
      },
    },
    Quartic: {
      In: function (amount) {
        return amount * amount * amount * amount;
      },
      Out: function (amount) {
        return 1 - --amount * amount * amount * amount;
      },
      InOut: function (amount) {
        if ((amount *= 2) < 1) {
          return 0.5 * amount * amount * amount * amount;
        }
        return -0.5 * ((amount -= 2) * amount * amount * amount - 2);
      },
    },
    Quintic: {
      In: function (amount) {
        return amount * amount * amount * amount * amount;
      },
      Out: function (amount) {
        return --amount * amount * amount * amount * amount + 1;
      },
      InOut: function (amount) {
        if ((amount *= 2) < 1) {
          return 0.5 * amount * amount * amount * amount * amount;
        }
        return 0.5 * ((amount -= 2) * amount * amount * amount * amount + 2);
      },
    },
    Sinusoidal: {
      In: function (amount) {
        return 1 - Math.cos((amount * Math.PI) / 2);
      },
      Out: function (amount) {
        return Math.sin((amount * Math.PI) / 2);
      },
      InOut: function (amount) {
        return 0.5 * (1 - Math.cos(Math.PI * amount));
      },
    },
    Exponential: {
      In: function (amount) {
        return amount === 0 ? 0 : Math.pow(1024, amount - 1);
      },
      Out: function (amount) {
        return amount === 1 ? 1 : 1 - Math.pow(2, -10 * amount);
      },
      InOut: function (amount) {
        if (amount === 0) {
          return 0;
        }
        if (amount === 1) {
          return 1;
        }
        if ((amount *= 2) < 1) {
          return 0.5 * Math.pow(1024, amount - 1);
        }
        return 0.5 * (-Math.pow(2, -10 * (amount - 1)) + 2);
      },
    },
    Circular: {
      In: function (amount) {
        return 1 - Math.sqrt(1 - amount * amount);
      },
      Out: function (amount) {
        return Math.sqrt(1 - --amount * amount);
      },
      InOut: function (amount) {
        if ((amount *= 2) < 1) {
          return -0.5 * (Math.sqrt(1 - amount * amount) - 1);
        }
        return 0.5 * (Math.sqrt(1 - (amount -= 2) * amount) + 1);
      },
    },
    Elastic: {
      In: function (amount) {
        if (amount === 0) {
          return 0;
        }
        if (amount === 1) {
          return 1;
        }
        return (
          -Math.pow(2, 10 * (amount - 1)) *
          Math.sin((amount - 1.1) * 5 * Math.PI)
        );
      },
      Out: function (amount) {
        if (amount === 0) {
          return 0;
        }
        if (amount === 1) {
          return 1;
        }
        return (
          Math.pow(2, -10 * amount) * Math.sin((amount - 0.1) * 5 * Math.PI) + 1
        );
      },
      InOut: function (amount) {
        if (amount === 0) {
          return 0;
        }
        if (amount === 1) {
          return 1;
        }
        amount *= 2;
        if (amount < 1) {
          return (
            -0.5 *
            Math.pow(2, 10 * (amount - 1)) *
            Math.sin((amount - 1.1) * 5 * Math.PI)
          );
        }
        return (
          0.5 *
            Math.pow(2, -10 * (amount - 1)) *
            Math.sin((amount - 1.1) * 5 * Math.PI) +
          1
        );
      },
    },
    Back: {
      In: function (amount) {
        var s = 1.70158;
        return amount * amount * ((s + 1) * amount - s);
      },
      Out: function (amount) {
        var s = 1.70158;
        return --amount * amount * ((s + 1) * amount + s) + 1;
      },
      InOut: function (amount) {
        var s = 1.70158 * 1.525;
        if ((amount *= 2) < 1) {
          return 0.5 * (amount * amount * ((s + 1) * amount - s));
        }
        return 0.5 * ((amount -= 2) * amount * ((s + 1) * amount + s) + 2);
      },
    },
    Bounce: {
      In: function (amount) {
        return 1 - Easing.Bounce.Out(1 - amount);
      },
      Out: function (amount) {
        if (amount < 1 / 2.75) {
          return 7.5625 * amount * amount;
        } else if (amount < 2 / 2.75) {
          return 7.5625 * (amount -= 1.5 / 2.75) * amount + 0.75;
        } else if (amount < 2.5 / 2.75) {
          return 7.5625 * (amount -= 2.25 / 2.75) * amount + 0.9375;
        } else {
          return 7.5625 * (amount -= 2.625 / 2.75) * amount + 0.984375;
        }
      },
      InOut: function (amount) {
        if (amount < 0.5) {
          return Easing.Bounce.In(amount * 2) * 0.5;
        }
        return Easing.Bounce.Out(amount * 2 - 1) * 0.5 + 0.5;
      },
    },
  };

  var now;
  // Include a performance.now polyfill.
  // In node.js, use process.hrtime.
  // eslint-disable-next-line
    // @ts-ignore
  if (
    typeof self === "undefined" &&
    typeof process !== "undefined" &&
    process.hrtime
  ) {
    now = function () {
      // eslint-disable-next-line
            // @ts-ignore
      var time = process.hrtime();
      // Convert [seconds, nanoseconds] to milliseconds.
      return time[0] * 1000 + time[1] / 1000000;
    };
  }
  // In a browser, use self.performance.now if it is available.
  else if (
    typeof self !== "undefined" &&
    self.performance !== undefined &&
    self.performance.now !== undefined
  ) {
    // This must be bound, because directly assigning this function
    // leads to an invocation exception in Chrome.
    now = self.performance.now.bind(self.performance);
  }
  // Use Date.now if it is available.
  else if (Date.now !== undefined) {
    now = Date.now;
  }
  // Otherwise, use 'new Date().getTime()'.
  else {
    now = function () {
      return new Date().getTime();
    };
  }
  var now$1 = now;

  /**
   * Controlling groups of tweens
   *
   * Using the TWEEN singleton to manage your tweens can cause issues in large apps with many components.
   * In these cases, you may want to create your own smaller groups of tween
   */
  var Group = /** @class */ (function () {
    function Group() {
      this._tweens = {};
      this._tweensAddedDuringUpdate = {};
    }
    Group.prototype.getAll = function () {
      var _this = this;
      return Object.keys(this._tweens).map(function (tweenId) {
        return _this._tweens[tweenId];
      });
    };
    Group.prototype.removeAll = function () {
      this._tweens = {};
    };
    Group.prototype.add = function (tween) {
      this._tweens[tween.getId()] = tween;
      this._tweensAddedDuringUpdate[tween.getId()] = tween;
    };
    Group.prototype.remove = function (tween) {
      delete this._tweens[tween.getId()];
      delete this._tweensAddedDuringUpdate[tween.getId()];
    };
    Group.prototype.update = function (time, preserve) {
      if (time === void 0) {
        time = now$1();
      }
      if (preserve === void 0) {
        preserve = false;
      }
      var tweenIds = Object.keys(this._tweens);
      if (tweenIds.length === 0) {
        return false;
      }
      // Tweens are updated in "batches". If you add a new tween during an
      // update, then the new tween will be updated in the next batch.
      // If you remove a tween during an update, it may or may not be updated.
      // However, if the removed tween was added during the current batch,
      // then it will not be updated.
      while (tweenIds.length > 0) {
        this._tweensAddedDuringUpdate = {};
        for (var i = 0; i < tweenIds.length; i++) {
          var tween = this._tweens[tweenIds[i]];
          var autoStart = !preserve;
          if (tween && tween.update(time, autoStart) === false && !preserve) {
            delete this._tweens[tweenIds[i]];
          }
        }
        tweenIds = Object.keys(this._tweensAddedDuringUpdate);
      }
      return true;
    };
    return Group;
  })();

  /**
   *
   */
  var Interpolation = {
    Linear: function (v, k) {
      var m = v.length - 1;
      var f = m * k;
      var i = Math.floor(f);
      var fn = Interpolation.Utils.Linear;
      if (k < 0) {
        return fn(v[0], v[1], f);
      }
      if (k > 1) {
        return fn(v[m], v[m - 1], m - f);
      }
      return fn(v[i], v[i + 1 > m ? m : i + 1], f - i);
    },
    Bezier: function (v, k) {
      var b = 0;
      var n = v.length - 1;
      var pw = Math.pow;
      var bn = Interpolation.Utils.Bernstein;
      for (var i = 0; i <= n; i++) {
        b += pw(1 - k, n - i) * pw(k, i) * v[i] * bn(n, i);
      }
      return b;
    },
    CatmullRom: function (v, k) {
      var m = v.length - 1;
      var f = m * k;
      var i = Math.floor(f);
      var fn = Interpolation.Utils.CatmullRom;
      if (v[0] === v[m]) {
        if (k < 0) {
          i = Math.floor((f = m * (1 + k)));
        }
        return fn(
          v[(i - 1 + m) % m],
          v[i],
          v[(i + 1) % m],
          v[(i + 2) % m],
          f - i
        );
      } else {
        if (k < 0) {
          return v[0] - (fn(v[0], v[0], v[1], v[1], -f) - v[0]);
        }
        if (k > 1) {
          return v[m] - (fn(v[m], v[m], v[m - 1], v[m - 1], f - m) - v[m]);
        }
        return fn(
          v[i ? i - 1 : 0],
          v[i],
          v[m < i + 1 ? m : i + 1],
          v[m < i + 2 ? m : i + 2],
          f - i
        );
      }
    },
    Utils: {
      Linear: function (p0, p1, t) {
        return (p1 - p0) * t + p0;
      },
      Bernstein: function (n, i) {
        var fc = Interpolation.Utils.Factorial;
        return fc(n) / fc(i) / fc(n - i);
      },
      Factorial: (function () {
        var a = [1];
        return function (n) {
          var s = 1;
          if (a[n]) {
            return a[n];
          }
          for (var i = n; i > 1; i--) {
            s *= i;
          }
          a[n] = s;
          return s;
        };
      })(),
      CatmullRom: function (p0, p1, p2, p3, t) {
        var v0 = (p2 - p0) * 0.5;
        var v1 = (p3 - p1) * 0.5;
        var t2 = t * t;
        var t3 = t * t2;
        return (
          (2 * p1 - 2 * p2 + v0 + v1) * t3 +
          (-3 * p1 + 3 * p2 - 2 * v0 - v1) * t2 +
          v0 * t +
          p1
        );
      },
    },
  };

  /**
   * Utils
   */
  var Sequence = /** @class */ (function () {
    function Sequence() {}
    Sequence.nextId = function () {
      return Sequence._nextId++;
    };
    Sequence._nextId = 0;
    return Sequence;
  })();

  var mainGroup = new Group();

  /**
   * Tween.js - Licensed under the MIT license
   * https://github.com/tweenjs/tween.js
   * ----------------------------------------------
   *
   * See https://github.com/tweenjs/tween.js/graphs/contributors for the full list of contributors.
   * Thank you all, you're awesome!
   */
  var Tween = /** @class */ (function () {
    function Tween(_object, _group) {
      if (_group === void 0) {
        _group = mainGroup;
      }
      this._object = _object;
      this._group = _group;
      this._isPaused = false;
      this._pauseStart = 0;
      this._valuesStart = {};
      this._valuesEnd = {};
      this._valuesStartRepeat = {};
      this._duration = 1000;
      this._initialRepeat = 0;
      this._repeat = 0;
      this._yoyo = false;
      this._isPlaying = false;
      this._reversed = false;
      this._delayTime = 0;
      this._startTime = 0;
      this._easingFunction = Easing.Linear.None;
      this._interpolationFunction = Interpolation.Linear;
      this._chainedTweens = [];
      this._onStartCallbackFired = false;
      this._id = Sequence.nextId();
      this._isChainStopped = false;
      this._goToEnd = false;
    }
    Tween.prototype.getId = function () {
      return this._id;
    };
    Tween.prototype.isPlaying = function () {
      return this._isPlaying;
    };
    Tween.prototype.isPaused = function () {
      return this._isPaused;
    };
    Tween.prototype.to = function (properties, duration) {
      // TODO? restore this, then update the 07_dynamic_to example to set fox
      // tween's to on each update. That way the behavior is opt-in (there's
      // currently no opt-out).
      // for (const prop in properties) this._valuesEnd[prop] = properties[prop]
      this._valuesEnd = Object.create(properties);
      if (duration !== undefined) {
        this._duration = duration;
      }
      return this;
    };
    Tween.prototype.duration = function (d) {
      this._duration = d;
      return this;
    };
    Tween.prototype.start = function (time) {
      if (this._isPlaying) {
        return this;
      }
      // eslint-disable-next-line
            this._group && this._group.add(this);
      this._repeat = this._initialRepeat;
      if (this._reversed) {
        // If we were reversed (f.e. using the yoyo feature) then we need to
        // flip the tween direction back to forward.
        this._reversed = false;
        for (var property in this._valuesStartRepeat) {
          this._swapEndStartRepeatValues(property);
          this._valuesStart[property] = this._valuesStartRepeat[property];
        }
      }
      this._isPlaying = true;
      this._isPaused = false;
      this._onStartCallbackFired = false;
      this._isChainStopped = false;
      this._startTime =
        time !== undefined
          ? typeof time === "string"
            ? now$1() + parseFloat(time)
            : time
          : now$1();
      this._startTime += this._delayTime;
      this._setupProperties(
        this._object,
        this._valuesStart,
        this._valuesEnd,
        this._valuesStartRepeat
      );
      return this;
    };
    Tween.prototype._setupProperties = function (
      _object,
      _valuesStart,
      _valuesEnd,
      _valuesStartRepeat
    ) {
      for (var property in _valuesEnd) {
        var startValue = _object[property];
        var startValueIsArray = Array.isArray(startValue);
        var propType = startValueIsArray ? "array" : typeof startValue;
        var isInterpolationList =
          !startValueIsArray && Array.isArray(_valuesEnd[property]);
        // If `to()` specifies a property that doesn't exist in the source object,
        // we should not set that property in the object
        if (propType === "undefined" || propType === "function") {
          continue;
        }
        // Check if an Array was provided as property value
        if (isInterpolationList) {
          var endValues = _valuesEnd[property];
          if (endValues.length === 0) {
            continue;
          }
          // handle an array of relative values
          endValues = endValues.map(
            this._handleRelativeValue.bind(this, startValue)
          );
          // Create a local copy of the Array with the start value at the front
          _valuesEnd[property] = [startValue].concat(endValues);
        }
        // handle the deepness of the values
        if (
          (propType === "object" || startValueIsArray) &&
          startValue &&
          !isInterpolationList
        ) {
          _valuesStart[property] = startValueIsArray ? [] : {};
          // eslint-disable-next-line
                    for (var prop in startValue) {
            // eslint-disable-next-line
                        // @ts-ignore FIXME?
            _valuesStart[property][prop] = startValue[prop];
          }
          _valuesStartRepeat[property] = startValueIsArray ? [] : {}; // TODO? repeat nested values? And yoyo? And array values?
          // eslint-disable-next-line
                    // @ts-ignore FIXME?
          this._setupProperties(
            startValue,
            _valuesStart[property],
            _valuesEnd[property],
            _valuesStartRepeat[property]
          );
        } else {
          // Save the starting value, but only once.
          if (typeof _valuesStart[property] === "undefined") {
            _valuesStart[property] = startValue;
          }
          if (!startValueIsArray) {
            // eslint-disable-next-line
                        // @ts-ignore FIXME?
            _valuesStart[property] *= 1.0; // Ensures we're using numbers, not strings
          }
          if (isInterpolationList) {
            // eslint-disable-next-line
                        // @ts-ignore FIXME?
            _valuesStartRepeat[property] = _valuesEnd[property]
              .slice()
              .reverse();
          } else {
            _valuesStartRepeat[property] = _valuesStart[property] || 0;
          }
        }
      }
    };
    Tween.prototype.stop = function () {
      if (!this._isChainStopped) {
        this._isChainStopped = true;
        this.stopChainedTweens();
      }
      if (!this._isPlaying) {
        return this;
      }
      // eslint-disable-next-line
            this._group && this._group.remove(this);
      this._isPlaying = false;
      this._isPaused = false;
      if (this._onStopCallback) {
        this._onStopCallback(this._object);
      }
      return this;
    };
    Tween.prototype.end = function () {
      this._goToEnd = true;
      this.update(Infinity);
      return this;
    };
    Tween.prototype.pause = function (time) {
      if (time === void 0) {
        time = now$1();
      }
      if (this._isPaused || !this._isPlaying) {
        return this;
      }
      this._isPaused = true;
      this._pauseStart = time;
      // eslint-disable-next-line
            this._group && this._group.remove(this);
      return this;
    };
    Tween.prototype.resume = function (time) {
      if (time === void 0) {
        time = now$1();
      }
      if (!this._isPaused || !this._isPlaying) {
        return this;
      }
      this._isPaused = false;
      this._startTime += time - this._pauseStart;
      this._pauseStart = 0;
      // eslint-disable-next-line
            this._group && this._group.add(this);
      return this;
    };
    Tween.prototype.stopChainedTweens = function () {
      for (
        var i = 0, numChainedTweens = this._chainedTweens.length;
        i < numChainedTweens;
        i++
      ) {
        this._chainedTweens[i].stop();
      }
      return this;
    };
    Tween.prototype.group = function (group) {
      this._group = group;
      return this;
    };
    Tween.prototype.delay = function (amount) {
      this._delayTime = amount;
      return this;
    };
    Tween.prototype.repeat = function (times) {
      this._initialRepeat = times;
      this._repeat = times;
      return this;
    };
    Tween.prototype.repeatDelay = function (amount) {
      this._repeatDelayTime = amount;
      return this;
    };
    Tween.prototype.yoyo = function (yoyo) {
      this._yoyo = yoyo;
      return this;
    };
    Tween.prototype.easing = function (easingFunction) {
      this._easingFunction = easingFunction;
      return this;
    };
    Tween.prototype.interpolation = function (interpolationFunction) {
      this._interpolationFunction = interpolationFunction;
      return this;
    };
    Tween.prototype.chain = function () {
      var tweens = [];
      for (var _i = 0; _i < arguments.length; _i++) {
        tweens[_i] = arguments[_i];
      }
      this._chainedTweens = tweens;
      return this;
    };
    Tween.prototype.onStart = function (callback) {
      this._onStartCallback = callback;
      return this;
    };
    Tween.prototype.onUpdate = function (callback) {
      this._onUpdateCallback = callback;
      return this;
    };
    Tween.prototype.onRepeat = function (callback) {
      this._onRepeatCallback = callback;
      return this;
    };
    Tween.prototype.onComplete = function (callback) {
      this._onCompleteCallback = callback;
      return this;
    };
    Tween.prototype.onStop = function (callback) {
      this._onStopCallback = callback;
      return this;
    };
    /**
     * @returns true if the tween is still playing after the update, false
     * otherwise (calling update on a paused tween still returns true because
     * it is still playing, just paused).
     */
    Tween.prototype.update = function (time, autoStart) {
      if (time === void 0) {
        time = now$1();
      }
      if (autoStart === void 0) {
        autoStart = true;
      }
      if (this._isPaused) return true;
      var property;
      var elapsed;
      var endTime = this._startTime + this._duration;
      if (!this._goToEnd && !this._isPlaying) {
        if (time > endTime) return false;
        if (autoStart) this.start(time);
      }
      this._goToEnd = false;
      if (time < this._startTime) {
        return true;
      }
      if (this._onStartCallbackFired === false) {
        if (this._onStartCallback) {
          this._onStartCallback(this._object);
        }
        this._onStartCallbackFired = true;
      }
      elapsed = (time - this._startTime) / this._duration;
      elapsed = this._duration === 0 || elapsed > 1 ? 1 : elapsed;
      var value = this._easingFunction(elapsed);
      // properties transformations
      this._updateProperties(
        this._object,
        this._valuesStart,
        this._valuesEnd,
        value
      );
      if (this._onUpdateCallback) {
        this._onUpdateCallback(this._object, elapsed);
      }
      if (elapsed === 1) {
        if (this._repeat > 0) {
          if (isFinite(this._repeat)) {
            this._repeat--;
          }
          // Reassign starting values, restart by making startTime = now
          for (property in this._valuesStartRepeat) {
            if (!this._yoyo && typeof this._valuesEnd[property] === "string") {
              this._valuesStartRepeat[property] =
                // eslint-disable-next-line
                                // @ts-ignore FIXME?
                this._valuesStartRepeat[property] +
                parseFloat(this._valuesEnd[property]);
            }
            if (this._yoyo) {
              this._swapEndStartRepeatValues(property);
            }
            this._valuesStart[property] = this._valuesStartRepeat[property];
          }
          if (this._yoyo) {
            this._reversed = !this._reversed;
          }
          if (this._repeatDelayTime !== undefined) {
            this._startTime = time + this._repeatDelayTime;
          } else {
            this._startTime = time + this._delayTime;
          }
          if (this._onRepeatCallback) {
            this._onRepeatCallback(this._object);
          }
          return true;
        } else {
          if (this._onCompleteCallback) {
            this._onCompleteCallback(this._object);
          }
          for (
            var i = 0, numChainedTweens = this._chainedTweens.length;
            i < numChainedTweens;
            i++
          ) {
            // Make the chained tweens start exactly at the time they should,
            // even if the `update()` method was called way past the duration of the tween
            this._chainedTweens[i].start(this._startTime + this._duration);
          }
          this._isPlaying = false;
          return false;
        }
      }
      return true;
    };
    Tween.prototype._updateProperties = function (
      _object,
      _valuesStart,
      _valuesEnd,
      value
    ) {
      for (var property in _valuesEnd) {
        // Don't update properties that do not exist in the source object
        if (_valuesStart[property] === undefined) {
          continue;
        }
        var start = _valuesStart[property] || 0;
        var end = _valuesEnd[property];
        var startIsArray = Array.isArray(_object[property]);
        var endIsArray = Array.isArray(end);
        var isInterpolationList = !startIsArray && endIsArray;
        if (isInterpolationList) {
          _object[property] = this._interpolationFunction(end, value);
        } else if (typeof end === "object" && end) {
          // eslint-disable-next-line
                    // @ts-ignore FIXME?
          this._updateProperties(_object[property], start, end, value);
        } else {
          // Parses relative end values with start as base (e.g.: +10, -3)
          end = this._handleRelativeValue(start, end);
          // Protect against non numeric properties.
          if (typeof end === "number") {
            // eslint-disable-next-line
                        // @ts-ignore FIXME?
            _object[property] = start + (end - start) * value;
          }
        }
      }
    };
    Tween.prototype._handleRelativeValue = function (start, end) {
      if (typeof end !== "string") {
        return end;
      }
      if (end.charAt(0) === "+" || end.charAt(0) === "-") {
        return start + parseFloat(end);
      } else {
        return parseFloat(end);
      }
    };
    Tween.prototype._swapEndStartRepeatValues = function (property) {
      var tmp = this._valuesStartRepeat[property];
      var endValue = this._valuesEnd[property];
      if (typeof endValue === "string") {
        this._valuesStartRepeat[property] =
          this._valuesStartRepeat[property] + parseFloat(endValue);
      } else {
        this._valuesStartRepeat[property] = this._valuesEnd[property];
      }
      this._valuesEnd[property] = tmp;
    };
    return Tween;
  })();

  var VERSION = "18.6.4";

  /**
   * Tween.js - Licensed under the MIT license
   * https://github.com/tweenjs/tween.js
   * ----------------------------------------------
   *
   * See https://github.com/tweenjs/tween.js/graphs/contributors for the full list of contributors.
   * Thank you all, you're awesome!
   */
  var nextId = Sequence.nextId;
  /**
   * Controlling groups of tweens
   *
   * Using the TWEEN singleton to manage your tweens can cause issues in large apps with many components.
   * In these cases, you may want to create your own smaller groups of tweens.
   */
  var TWEEN = mainGroup;
  // This is the best way to export things in a way that's compatible with both ES
  // Modules and CommonJS, without build hacks, and so as not to break the
  // existing API.
  // https://github.com/rollup/rollup/issues/1961#issuecomment-423037881
  var getAll = TWEEN.getAll.bind(TWEEN);
  var removeAll = TWEEN.removeAll.bind(TWEEN);
  var add = TWEEN.add.bind(TWEEN);
  var remove = TWEEN.remove.bind(TWEEN);
  var update = TWEEN.update.bind(TWEEN);
  var exports$1 = {
    Easing: Easing,
    Group: Group,
    Interpolation: Interpolation,
    now: now$1,
    Sequence: Sequence,
    nextId: nextId,
    Tween: Tween,
    VERSION: VERSION,
    getAll: getAll,
    removeAll: removeAll,
    add: add,
    remove: remove,
    update: update,
  };

  exports.Easing = Easing;
  exports.Group = Group;
  exports.Interpolation = Interpolation;
  exports.Sequence = Sequence;
  exports.Tween = Tween;
  exports.VERSION = VERSION;
  exports.add = add;
  exports.default = exports$1;
  exports.getAll = getAll;
  exports.nextId = nextId;
  exports.now = now$1;
  exports.remove = remove;
  exports.removeAll = removeAll;
  exports.update = update;

  Object.defineProperty(exports, "__esModule", { value: true });
});
